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Book Sections Year : 2009

New Anonymity Notions for Identity-Based Encryption


Identity-based encryption is a very convenient tool to avoid key management. Recipient-privacy is also a major concern nowadays. To combine both, anonymous identity-based encryption has been proposed. This paper extends this notion to stronger adversaries (the authority itself). We discuss this new notion, together with a new kind of non-malleability with respect to the identity, for several existing schemes. Inter- estingly enough, such a new anonymity property has an independent application to password-authenticated key exchange. We thus come up with a new generic framework for password-authenticated key exchange, and a concrete construction based on pairings.
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inria-00419144 , version 1 (22-09-2009)


  • HAL Id : inria-00419144 , version 1


Malika Izabachène, David Pointcheval. New Anonymity Notions for Identity-Based Encryption. V. Cortier and C. Kirchner and M. Okada and H. Sakurada. Formal to Practical Security, LNCS 5458, Springer-Verlag, pp.138--157, 2009, Lecture notes in computer science. ⟨inria-00419144⟩
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